Fuzzy Yellow Balls is an online tennis instruction brand that helps players improve their technique, tactics, and confidence through video-based learning. Its content includes lessons on strokes, doubles play, and match strategy, alongside structured programs from experienced coaches and specialists. The Singles Playbook offers 41 tactical plays designed to help players use their strengths, target opponents’ weaknesses, and reduce errors in matches. The Doubles Playbook focuses on strategies for team play. Other programs cover the windshield-wiper forehand, serve development, arm conditioning, and managing nerves on important points.

Fuzzy Yellow Balls also offers ServeLab, a service that uses computer vision to analyze a player’s serve from a video recorded on a phone. The analysis examines the serve’s kinetic chain and provides drills intended to address technique issues. The site describes planned forehand and backhand analysis features as future additions. Programs are available through the FYB Library for viewing on phones, tablets, and computers, and the Singles Playbook is offered in digital and print editions.